Although extremely liberal or very conservative candidates have been nominated for office, only candidates have been elected.

Moderate.

Explanation:

Political moderation is the political manifestation in which their representatives, regardless of the party they are, do not adhere to the most radical positions of their party, but remain within the central positions of the same, but in a position tending towards the consensus and dialogue with other political forces.

Thus, moderate politicians do not support the most extreme positions of their party, but, on the contrary, only support its fundamental values, abandoning the positions of conflict that can arise from the defense of more radical theories. An example of a moderate politician within the Democratic Party is Barack Obama, while an example of the same tenor within the Republican Party is Mitt Romney.

a goverment for the people by the people